To allow the vehicle’s transmission to operate while driving in EV-mode (combustion engine shut off), a parallel oil supply system is added.

The system contains a (off the shelf) E-driven oil pump and valve to maintain only the strictly necessary lubrication while driving purely EV. Some additional parts are added to have a fully integrated system. The transmission housing is adapted by adding channels, mounting features and valve bores. A carefully chosen placement of the auxiliary system leaves the best position for the controller & interface of the E-pump. Adaptations are made to the transmission’s mechanically driven oil pump to cope with the rotational differences in EV-mode.

BRACE was able to pull this off in only 6 months development time for Proof-of-Concept to series tooling release.

After a thorough investigation of transmission functional and subsystem requirements a concept was created and validated using the following steps:

A-sample design as proof of concept using existing components. Testbench test used for requirement validation.

B2-sample prototypes based on adapting B1-sample tooling for full system integration prototypes (and tests).

After Successful B2-sample vehicle functional tests design for series tooling is completed.

Being in close collaboration at the clients’ organisation the customer benefited from an exceptional short lead time.

other references

about BRACE automotive

BRACE automotive engineers are “passionate about technology”. We develop and engineer automotive systems and components for OEM vehicle manufacturers, 1st and 2nd Tier suppliers and other niche organizations. Our main disciplines are organized in vehicle systems, embedded controls and software, mechanical design and development, and specific competence clusters.

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